rbiva.com

Valid Email Server
Domain Lookup › rbiva.com

Domain Overview

DNS: ✓ 2d ago Checker: ✓ 2d ago
rbiva.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-05-19 07:18:09 UTC · ↺ Refresh

MX Hostnames

  • us-smtp-inbound-1.mimecast.com
  • us-smtp-inbound-2.mimecast.com

MX Priorities

  • us-smtp-inbound-2.mimecast.com: 10
  • us-smtp-inbound-1.mimecast.com: 10

A / AAAA Records

  • 77.247.127.16 (no PTR)

Mail Server IPs

  • 170.10.132.221 ↩ us-smtp-inbound-1.mimecast.com
  • 170.10.128.221 ↩ us-smtp-inbound-2.mimecast.com
  • 170.10.128.141 ↩ us-smtp-inbound-1.mimecast.com
  • 170.10.128.242 ↩ us-smtp-inbound-2.mimecast.com
  • 170.10.132.242 ↩ us-smtp-inbound-2.mimecast.com
  • 170.10.132.141 ↩ us-smtp-inbound-1.mimecast.com

SOA Record

Raw SOA ns1-05.azure-dns.com dnsadmin.comfortsystemsusa.com 205201411 86400 7200 1209600 7200
Primary NS (mname)
ns1-05.azure-dns.com
Admin Email (rname)
dnsadmin@comfortsystemsusa.com
Serial
205201411
Refresh
86400s
Retry
7200s
Expire
1209600s
Minimum TTL
7200s

Nameservers (NS)

ns1-05.azure-dns.com
ns2-05.azure-dns.net
ns3-05.azure-dns.org
ns4-05.azure-dns.info

SPF Record

✓ Strict (-all)
v=spf1 mx:comfortsystemsusa-com.mail.protection.outlook.com ip4:72.32.72.85 ip4:162.242.134.119 ip4:72.32.72.83 ip4:72.32.72.84 include:_spf.e2ma.net include:spf_all.comfortsystemsusa.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

6 records
  • e2ma-verification=cgsgb
  • smartsheet-site-validation=nGgVavp_bSH3foHHI2cio3_frmXsRXrQ
  • SPFv=spf1 mx:comfortsystemsusa-com.mail.protection.outlook.com ip4:72.32.72.85 ip4:162.242.134.119 ip4:72.32.72.83 ip4:72.32.72.84 include:_spf.e2ma.net include:spf_all.comfortsystemsusa.com -all
  • MS=ms61622502
  • WYTlDc96ZozlMfdPztXK31Y67j6eO75Z59QxSZ1PVCjnfvdXZXMwiwu4Lsk/ILx+uwMc8sUGBWbhg4MzxMAEdg==
  • openai-domain-verification=dv-mZIhOd7sjgwbrqeNNc8Vvi59
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